About YORK Pat
About Weatherford Int’l.
About SUTHERLAND Mike
About Weatherford Int’l.
About STEPHENSON David
About Weatherford Int’l.
About RING Lev
About Weatherford Int’l.
About Proceedings. Annual Offshore Technology Conference
About oil well
About excavation
About liner(lining)
About borehole
About case study
About bit
About casing shoe
About Drilling
About 固体
About 拡張
About ライナ
About ケーシングシュー